Money and manpower at start cannot be modded as far as I know. It is certainly determined by the engine and I never found how to solve this.
Money at start can be set in the country file, e.g.
in the vanilla game for country Adal for the 1419 scenario it would be in file
1419_ada.inc
in the folder
\For the Glory\Scenarios\1419
The line about treasury:
Code:
# Adal #
country = {
tag = ADA
ai = "default_ai.txt"
colonialattempts = 0
colonialnation = no
major = no
colonists = 0
cancelledloans = 0
extendedloans = 0
treasury = 200
inflation = 0
diplomats = 0
merchants = 0
religion = { type = sunni }
culture = { type = somali type = afar type = arab }
diplomacy = { }
...